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- <?php
- /**
- * @package dompdf
- * @link http://dompdf.github.com/
- * @author Benj Carson <benjcarson@digitaljunkies.ca>
- * @author Helmut Tischer <htischer@weihenstephan.org>
- * @author Fabien Ménager <fabien.menager@gmail.com>
- * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
- */
- /**
- * Base renderer class
- *
- * @access private
- * @package dompdf
- */
- abstract class Abstract_Renderer {
- /**
- * Rendering backend
- *
- * @var Canvas
- */
- protected $_canvas;
- /**
- * Current dompdf instance
- *
- * @var DOMPDF
- */
- protected $_dompdf;
-
- /**
- * Class constructor
- *
- * @param DOMPDF $dompdf The current dompdf instance
- */
- function __construct(DOMPDF $dompdf) {
- $this->_dompdf = $dompdf;
- $this->_canvas = $dompdf->get_canvas();
- }
-
- /**
- * Render a frame.
- *
- * Specialized in child classes
- *
- * @param Frame $frame The frame to render
- */
- abstract function render(Frame $frame);
- //........................................................................
- /**
- * Render a background image over a rectangular area
- *
- * @param string $url The background image to load
- * @param float $x The left edge of the rectangular area
- * @param float $y The top edge of the rectangular area
- * @param float $width The width of the rectangular area
- * @param float $height The height of the rectangular area
- * @param Style $style The associated Style object
- */
- protected function _background_image($url, $x, $y, $width, $height, $style) {
- $sheet = $style->get_stylesheet();
- // Skip degenerate cases
- if ( $width == 0 || $height == 0 ) {
- return;
- }
-
- $box_width = $width;
- $box_height = $height;
- //debugpng
- if (DEBUGPNG) print '[_background_image '.$url.']';
- list($img, $type, /*$msg*/) = Image_Cache::resolve_url(
- $url,
- $sheet->get_protocol(),
- $sheet->get_host(),
- $sheet->get_base_path(),
- $this->_dompdf
- );
- // Bail if the image is no good
- if ( Image_Cache::is_broken($img) ) {
- return;
- }
- //Try to optimize away reading and composing of same background multiple times
- //Postponing read with imagecreatefrom ...()
- //final composition parameters and name not known yet
- //Therefore read dimension directly from file, instead of creating gd object first.
- //$img_w = imagesx($src); $img_h = imagesy($src);
- list($img_w, $img_h) = dompdf_getimagesize($img);
- if (!isset($img_w) || $img_w == 0 || !isset($img_h) || $img_h == 0) {
- return;
- }
- $repeat = $style->background_repeat;
- $dpi = $this->_dompdf->get_option("dpi");
- //Increase background resolution and dependent box size according to image resolution to be placed in
- //Then image can be copied in without resize
- $bg_width = round((float)($width * $dpi) / 72);
- $bg_height = round((float)($height * $dpi) / 72);
- //Need %bg_x, $bg_y as background pos, where img starts, converted to pixel
- list($bg_x, $bg_y) = $style->background_position;
- if ( is_percent($bg_x) ) {
- // The point $bg_x % from the left edge of the image is placed
- // $bg_x % from the left edge of the background rectangle
- $p = ((float)$bg_x)/100.0;
- $x1 = $p * $img_w;
- $x2 = $p * $bg_width;
- $bg_x = $x2 - $x1;
- }
- else {
- $bg_x = (float)($style->length_in_pt($bg_x)*$dpi) / 72;
- }
-
- $bg_x = round($bg_x + $style->length_in_pt($style->border_left_width)*$dpi / 72);
- if ( is_percent($bg_y) ) {
- // The point $bg_y % from the left edge of the image is placed
- // $bg_y % from the left edge of the background rectangle
- $p = ((float)$bg_y)/100.0;
- $y1 = $p * $img_h;
- $y2 = $p * $bg_height;
- $bg_y = $y2 - $y1;
- }
- else {
- $bg_y = (float)($style->length_in_pt($bg_y)*$dpi) / 72;
- }
-
- $bg_y = round($bg_y + $style->length_in_pt($style->border_top_width)*$dpi / 72);
- //clip background to the image area on partial repeat. Nothing to do if img off area
- //On repeat, normalize start position to the tile at immediate left/top or 0/0 of area
- //On no repeat with positive offset: move size/start to have offset==0
- //Handle x/y Dimensions separately
- if ( $repeat !== "repeat" && $repeat !== "repeat-x" ) {
- //No repeat x
- if ($bg_x < 0) {
- $bg_width = $img_w + $bg_x;
- }
- else {
- $x += ($bg_x * 72)/$dpi;
- $bg_width = $bg_width - $bg_x;
- if ($bg_width > $img_w) {
- $bg_width = $img_w;
- }
- $bg_x = 0;
- }
-
- if ($bg_width <= 0) {
- return;
- }
-
- $width = (float)($bg_width * 72)/$dpi;
- }
- else {
- //repeat x
- if ($bg_x < 0) {
- $bg_x = - ((-$bg_x) % $img_w);
- }
- else {
- $bg_x = $bg_x % $img_w;
- if ($bg_x > 0) {
- $bg_x -= $img_w;
- }
- }
- }
- if ( $repeat !== "repeat" && $repeat !== "repeat-y" ) {
- //no repeat y
- if ($bg_y < 0) {
- $bg_height = $img_h + $bg_y;
- }
- else {
- $y += ($bg_y * 72)/$dpi;
- $bg_height = $bg_height - $bg_y;
- if ($bg_height > $img_h) {
- $bg_height = $img_h;
- }
- $bg_y = 0;
- }
- if ($bg_height <= 0) {
- return;
- }
- $height = (float)($bg_height * 72)/$dpi;
- }
- else {
- //repeat y
- if ($bg_y < 0) {
- $bg_y = - ((-$bg_y) % $img_h);
- }
- else {
- $bg_y = $bg_y % $img_h;
- if ($bg_y > 0) {
- $bg_y -= $img_h;
- }
- }
- }
- //Optimization, if repeat has no effect
- if ( $repeat === "repeat" && $bg_y <= 0 && $img_h+$bg_y >= $bg_height ) {
- $repeat = "repeat-x";
- }
-
- if ( $repeat === "repeat" && $bg_x <= 0 && $img_w+$bg_x >= $bg_width ) {
- $repeat = "repeat-y";
- }
-
- if ( ($repeat === "repeat-x" && $bg_x <= 0 && $img_w+$bg_x >= $bg_width) ||
- ($repeat === "repeat-y" && $bg_y <= 0 && $img_h+$bg_y >= $bg_height) ) {
- $repeat = "no-repeat";
- }
- //Use filename as indicator only
- //different names for different variants to have different copies in the pdf
- //This is not dependent of background color of box! .'_'.(is_array($bg_color) ? $bg_color["hex"] : $bg_color)
- //Note: Here, bg_* are the start values, not end values after going through the tile loops!
- $filedummy = $img;
-
- $is_png = false;
- $filedummy .= '_'.$bg_width.'_'.$bg_height.'_'.$bg_x.'_'.$bg_y.'_'.$repeat;
- //Optimization to avoid multiple times rendering the same image.
- //If check functions are existing and identical image already cached,
- //then skip creation of duplicate, because it is not needed by addImagePng
- if ( $this->_canvas instanceof CPDF_Adapter &&
- $this->_canvas->get_cpdf()->image_iscached($filedummy) ) {
- $bg = null;
- }
-
- else {
-
- // Create a new image to fit over the background rectangle
- $bg = imagecreatetruecolor($bg_width, $bg_height);
-
- switch (strtolower($type)) {
- case IMAGETYPE_PNG:
- $is_png = true;
- imagesavealpha($bg, true);
- imagealphablending($bg, false);
- $src = imagecreatefrompng($img);
- break;
-
- case IMAGETYPE_JPEG:
- $src = imagecreatefromjpeg($img);
- break;
-
- case IMAGETYPE_GIF:
- $src = imagecreatefromgif($img);
- break;
-
- case IMAGETYPE_BMP:
- $src = imagecreatefrombmp($img);
- break;
-
- default:
- return; // Unsupported image type
- }
-
- if ( $src == null ) {
- return;
- }
-
- //Background color if box is not relevant here
- //Non transparent image: box clipped to real size. Background non relevant.
- //Transparent image: The image controls the transparency and lets shine through whatever background.
- //However on transparent image preset the composed image with the transparency color,
- //to keep the transparency when copying over the non transparent parts of the tiles.
- $ti = imagecolortransparent($src);
-
- if ( $ti >= 0 ) {
- $tc = imagecolorsforindex($src, $ti);
- $ti = imagecolorallocate($bg, $tc['red'], $tc['green'], $tc['blue']);
- imagefill($bg, 0, 0, $ti);
- imagecolortransparent($bg, $ti);
- }
-
- //This has only an effect for the non repeatable dimension.
- //compute start of src and dest coordinates of the single copy
- if ( $bg_x < 0 ) {
- $dst_x = 0;
- $src_x = -$bg_x;
- }
- else {
- $src_x = 0;
- $dst_x = $bg_x;
- }
-
- if ( $bg_y < 0 ) {
- $dst_y = 0;
- $src_y = -$bg_y;
- }
- else {
- $src_y = 0;
- $dst_y = $bg_y;
- }
-
- //For historical reasons exchange meanings of variables:
- //start_* will be the start values, while bg_* will be the temporary start values in the loops
- $start_x = $bg_x;
- $start_y = $bg_y;
-
- // Copy regions from the source image to the background
- if ( $repeat === "no-repeat" ) {
-
- // Simply place the image on the background
- imagecopy($bg, $src, $dst_x, $dst_y, $src_x, $src_y, $img_w, $img_h);
-
- }
- else if ( $repeat === "repeat-x" ) {
-
- for ( $bg_x = $start_x; $bg_x < $bg_width; $bg_x += $img_w ) {
- if ( $bg_x < 0 ) {
- $dst_x = 0;
- $src_x = -$bg_x;
- $w = $img_w + $bg_x;
- }
- else {
- $dst_x = $bg_x;
- $src_x = 0;
- $w = $img_w;
- }
- imagecopy($bg, $src, $dst_x, $dst_y, $src_x, $src_y, $w, $img_h);
- }
-
- }
- else if ( $repeat === "repeat-y" ) {
-
- for ( $bg_y = $start_y; $bg_y < $bg_height; $bg_y += $img_h ) {
- if ( $bg_y < 0 ) {
- $dst_y = 0;
- $src_y = -$bg_y;
- $h = $img_h + $bg_y;
- }
- else {
- $dst_y = $bg_y;
- $src_y = 0;
- $h = $img_h;
- }
- imagecopy($bg, $src, $dst_x, $dst_y, $src_x, $src_y, $img_w, $h);
-
- }
-
- }
- else if ( $repeat === "repeat" ) {
-
- for ( $bg_y = $start_y; $bg_y < $bg_height; $bg_y += $img_h ) {
- for ( $bg_x = $start_x; $bg_x < $bg_width; $bg_x += $img_w ) {
-
- if ( $bg_x < 0 ) {
- $dst_x = 0;
- $src_x = -$bg_x;
- $w = $img_w + $bg_x;
- }
- else {
- $dst_x = $bg_x;
- $src_x = 0;
- $w = $img_w;
- }
-
- if ( $bg_y < 0 ) {
- $dst_y = 0;
- $src_y = -$bg_y;
- $h = $img_h + $bg_y;
- }
- else {
- $dst_y = $bg_y;
- $src_y = 0;
- $h = $img_h;
- }
- imagecopy($bg, $src, $dst_x, $dst_y, $src_x, $src_y, $w, $h);
- }
- }
- }
-
- else {
- print 'Unknown repeat!';
- }
-
- imagedestroy($src);
- } /* End optimize away creation of duplicates */
- $this->_canvas->clipping_rectangle($x, $y, $box_width, $box_height);
-
- //img: image url string
- //img_w, img_h: original image size in px
- //width, height: box size in pt
- //bg_width, bg_height: box size in px
- //x, y: left/top edge of box on page in pt
- //start_x, start_y: placement of image relative to pattern
- //$repeat: repeat mode
- //$bg: GD object of result image
- //$src: GD object of original image
- //When using cpdf and optimization to direct png creation from gd object is available,
- //don't create temp file, but place gd object directly into the pdf
- if ( !$is_png && $this->_canvas instanceof CPDF_Adapter ) {
- // Note: CPDF_Adapter image converts y position
- $this->_canvas->get_cpdf()->addImagePng($filedummy, $x, $this->_canvas->get_height() - $y - $height, $width, $height, $bg);
- }
-
- else {
- $tmp_dir = $this->_dompdf->get_option("temp_dir");
- $tmp_name = tempnam($tmp_dir, "bg_dompdf_img_");
- @unlink($tmp_name);
- $tmp_file = "$tmp_name.png";
-
- //debugpng
- if (DEBUGPNG) print '[_background_image '.$tmp_file.']';
- imagepng($bg, $tmp_file);
- $this->_canvas->image($tmp_file, $x, $y, $width, $height);
- imagedestroy($bg);
- //debugpng
- if (DEBUGPNG) print '[_background_image unlink '.$tmp_file.']';
- if (!DEBUGKEEPTEMP) {
- unlink($tmp_file);
- }
- }
-
- $this->_canvas->clipping_end();
- }
-
- protected function _get_dash_pattern($style, $width) {
- $pattern = array();
-
- switch ($style) {
- default:
- /*case "solid":
- case "double":
- case "groove":
- case "inset":
- case "outset":
- case "ridge":*/
- case "none": break;
-
- case "dotted":
- if ( $width <= 1 )
- $pattern = array($width, $width*2);
- else
- $pattern = array($width);
- break;
-
- case "dashed":
- $pattern = array(3 * $width);
- break;
- }
-
- return $pattern;
- }
- protected function _border_none($x, $y, $length, $color, $widths, $side, $corner_style = "bevel", $r1 = 0, $r2 = 0) {
- return;
- }
-
- protected function _border_hidden($x, $y, $length, $color, $widths, $side, $corner_style = "bevel", $r1 = 0, $r2 = 0) {
- return;
- }
-
- // Border rendering functions
- protected function _border_dotted($x, $y, $length, $color, $widths, $side, $corner_style = "bevel", $r1 = 0, $r2 = 0) {
- $this->_border_line($x, $y, $length, $color, $widths, $side, $corner_style, "dotted", $r1, $r2);
- }
- protected function _border_dashed($x, $y, $length, $color, $widths, $side, $corner_style = "bevel", $r1 = 0, $r2 = 0) {
- $this->_border_line($x, $y, $length, $color, $widths, $side, $corner_style, "dashed", $r1, $r2);
- }
- protected function _border_solid($x, $y, $length, $color, $widths, $side, $corner_style = "bevel", $r1 = 0, $r2 = 0) {
- // TODO: Solve rendering where one corner is beveled (radius == 0), one corner isn't.
- if ( $corner_style !== "bevel" || $r1 > 0 || $r2 > 0 ) {
- // do it the simple way
- $this->_border_line($x, $y, $length, $color, $widths, $side, $corner_style, "solid", $r1, $r2);
- return;
- }
- list($top, $right, $bottom, $left) = $widths;
- // All this polygon business is for beveled corners...
- switch ($side) {
- case "top":
- $points = array($x, $y,
- $x + $length, $y,
- $x + $length - $right, $y + $top,
- $x + $left, $y + $top);
- $this->_canvas->polygon($points, $color, null, null, true);
- break;
-
- case "bottom":
- $points = array($x, $y,
- $x + $length, $y,
- $x + $length - $right, $y - $bottom,
- $x + $left, $y - $bottom);
- $this->_canvas->polygon($points, $color, null, null, true);
- break;
-
- case "left":
- $points = array($x, $y,
- $x, $y + $length,
- $x + $left, $y + $length - $bottom,
- $x + $left, $y + $top);
- $this->_canvas->polygon($points, $color, null, null, true);
- break;
-
- case "right":
- $points = array($x, $y,
- $x, $y + $length,
- $x - $right, $y + $length - $bottom,
- $x - $right, $y + $top);
- $this->_canvas->polygon($points, $color, null, null, true);
- break;
-
- default:
- return;
- }
- }
- protected function _apply_ratio($side, $ratio, $top, $right, $bottom, $left, &$x, &$y, &$length, &$r1, &$r2) {
- switch ($side) {
- case "top":
- $r1 -= $left * $ratio;
- $r2 -= $right * $ratio;
- $x += $left * $ratio;
- $y += $top * $ratio;
- $length -= $left * $ratio + $right * $ratio;
- break;
- case "bottom":
- $r1 -= $right * $ratio;
- $r2 -= $left * $ratio;
- $x += $left * $ratio;
- $y -= $bottom * $ratio;
- $length -= $left * $ratio + $right * $ratio;
- break;
- case "left":
- $r1 -= $top * $ratio;
- $r2 -= $bottom * $ratio;
- $x += $left * $ratio;
- $y += $top * $ratio;
- $length -= $top * $ratio + $bottom * $ratio;
- break;
- case "right":
- $r1 -= $bottom * $ratio;
- $r2 -= $top * $ratio;
- $x -= $right * $ratio;
- $y += $top * $ratio;
- $length -= $top * $ratio + $bottom * $ratio;
- break;
- default:
- return;
- }
- }
- protected function _border_double($x, $y, $length, $color, $widths, $side, $corner_style = "bevel", $r1 = 0, $r2 = 0) {
- list($top, $right, $bottom, $left) = $widths;
- $third_widths = array($top / 3, $right / 3, $bottom / 3, $left / 3);
- // draw the outer border
- $this->_border_solid($x, $y, $length, $color, $third_widths, $side, $corner_style, $r1, $r2);
- $this->_apply_ratio($side, 2/3, $top, $right, $bottom, $left, $x, $y, $length, $r1, $r2);
- $this->_border_solid($x, $y, $length, $color, $third_widths, $side, $corner_style, $r1, $r2);
- }
- protected function _border_groove($x, $y, $length, $color, $widths, $side, $corner_style = "bevel", $r1 = 0, $r2 = 0) {
- list($top, $right, $bottom, $left) = $widths;
- $half_widths = array($top / 2, $right / 2, $bottom / 2, $left / 2);
- $this->_border_inset($x, $y, $length, $color, $half_widths, $side, $corner_style, $r1, $r2);
-
- $this->_apply_ratio($side, 0.5, $top, $right, $bottom, $left, $x, $y, $length, $r1, $r2);
- $this->_border_outset($x, $y, $length, $color, $half_widths, $side, $corner_style, $r1, $r2);
- }
- protected function _border_ridge($x, $y, $length, $color, $widths, $side, $corner_style = "bevel", $r1 = 0, $r2 = 0) {
- list($top, $right, $bottom, $left) = $widths;
- $half_widths = array($top / 2, $right / 2, $bottom / 2, $left / 2);
- $this->_border_outset($x, $y, $length, $color, $half_widths, $side, $corner_style, $r1, $r2);
-
- $this->_apply_ratio($side, 0.5, $top, $right, $bottom, $left, $x, $y, $length, $r1, $r2);
- $this->_border_inset($x, $y, $length, $color, $half_widths, $side, $corner_style, $r1, $r2);
- }
- protected function _tint($c) {
- if ( !is_numeric($c) )
- return $c;
- return min(1, $c + 0.16);
- }
- protected function _shade($c) {
- if ( !is_numeric($c) )
- return $c;
- return max(0, $c - 0.33);
- }
- protected function _border_inset($x, $y, $length, $color, $widths, $side, $corner_style = "bevel", $r1 = 0, $r2 = 0) {
- switch ($side) {
- case "top":
- case "left":
- $shade = array_map(array($this, "_shade"), $color);
- $this->_border_solid($x, $y, $length, $shade, $widths, $side, $corner_style, $r1, $r2);
- break;
-
- case "bottom":
- case "right":
- $tint = array_map(array($this, "_tint"), $color);
- $this->_border_solid($x, $y, $length, $tint, $widths, $side, $corner_style, $r1, $r2);
- break;
-
- default:
- return;
- }
- }
- protected function _border_outset($x, $y, $length, $color, $widths, $side, $corner_style = "bevel", $r1 = 0, $r2 = 0) {
- switch ($side) {
- case "top":
- case "left":
- $tint = array_map(array($this, "_tint"), $color);
- $this->_border_solid($x, $y, $length, $tint, $widths, $side, $corner_style, $r1, $r2);
- break;
-
- case "bottom":
- case "right":
- $shade = array_map(array($this, "_shade"), $color);
- $this->_border_solid($x, $y, $length, $shade, $widths, $side, $corner_style, $r1, $r2);
- break;
-
- default:
- return;
- }
- }
- // Draws a solid, dotted, or dashed line, observing the border radius
- protected function _border_line($x, $y, $length, $color, $widths, $side, $corner_style = "bevel", $pattern_name, $r1 = 0, $r2 = 0) {
- list($top, $right, $bottom, $left) = $widths;
-
- $width = $$side;
- $pattern = $this->_get_dash_pattern($pattern_name, $width);
- $half_width = $width/2;
- $r1 -= $half_width;
- $r2 -= $half_width;
- $adjust = $r1/80;
- $length -= $width;
-
- switch ($side) {
- case "top":
- $x += $half_width;
- $y += $half_width;
-
- if ( $r1 > 0 ) {
- $this->_canvas->arc($x + $r1, $y + $r1, $r1, $r1, 90-$adjust, 135+$adjust, $color, $width, $pattern);
- }
-
- $this->_canvas->line($x + $r1, $y, $x + $length - $r2, $y, $color, $width, $pattern);
-
- if ( $r2 > 0 ) {
- $this->_canvas->arc($x + $length - $r2, $y + $r2, $r2, $r2, 45-$adjust, 90+$adjust, $color, $width, $pattern);
- }
- break;
-
- case "bottom":
- $x += $half_width;
- $y -= $half_width;
-
- if ( $r1 > 0 ) {
- $this->_canvas->arc($x + $r1, $y - $r1, $r1, $r1, 225-$adjust, 270+$adjust, $color, $width, $pattern);
- }
-
- $this->_canvas->line($x + $r1, $y, $x + $length - $r2, $y, $color, $width, $pattern);
-
- if ( $r2 > 0 ) {
- $this->_canvas->arc($x + $length - $r2, $y - $r2, $r2, $r2, 270-$adjust, 315+$adjust, $color, $width, $pattern);
- }
- break;
-
- case "left":
- $y += $half_width;
- $x += $half_width;
-
- if ( $r1 > 0 ) {
- $this->_canvas->arc($x + $r1, $y + $r1, $r1, $r1, 135-$adjust, 180+$adjust, $color, $width, $pattern);
- }
-
- $this->_canvas->line($x, $y + $r1, $x, $y + $length - $r2, $color, $width, $pattern);
-
- if ( $r2 > 0 ) {
- $this->_canvas->arc($x + $r2, $y + $length - $r2, $r2, $r2, 180-$adjust, 225+$adjust, $color, $width, $pattern);
- }
- break;
-
- case "right":
- $y += $half_width;
- $x -= $half_width;
-
- if ( $r1 > 0 ) {
- $this->_canvas->arc($x - $r1, $y + $r1, $r1, $r1, 0-$adjust, 45+$adjust, $color, $width, $pattern);
- }
-
- $this->_canvas->line($x, $y + $r1, $x, $y + $length - $r2, $color, $width, $pattern);
-
- if ( $r2 > 0 ) {
- $this->_canvas->arc($x - $r2, $y + $length - $r2, $r2, $r2, 315-$adjust, 360+$adjust, $color, $width, $pattern);
- }
- break;
- }
- }
- protected function _set_opacity($opacity) {
- if ( is_numeric($opacity) && $opacity <= 1.0 && $opacity >= 0.0 ) {
- $this->_canvas->set_opacity( $opacity );
- }
- }
- protected function _debug_layout($box, $color = "red", $style = array()) {
- $this->_canvas->rectangle($box[0], $box[1], $box[2], $box[3], CSS_Color::parse($color), 0.1, $style);
- }
- }
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